Anselm's Neglected Argument

Brian Leftow

Abstract

Anselm is commonly credited with two a
priori
arguments for God's existence, the non-modal argument of Proslogion
2 and a modal argument some find in Proslogion
3. But his Reply
to
Gaunilo contains a third. The argument as Anselm gives it has flaws, but they are not fatal, and its main premise can serve as the basis of a simpler, stronger argument.